Air Quality Data provided by: the Air Quality in Wales (airquality.gov.wales)
Note that the measurement for PM2.5 (fine particulate matter) are taken from the station: Port Talbot Margam and the measurements for PM10 (respirable particulate matter), O3 (ozone), NO2 (nitrogen dioxide) and SO2 (sulfur dioxide) are taken from the station: Port Talbot Little Warren